Abstract
The effect inflammation has on cancer prognosis is marked by the presence of cytokines and chemokines. Interleukin-6 (IL-6) is one a multifunctional cytokine that regulates inflammatory responses. We investigated the roles of IL-6 and STAT3 and examined the relationship between IL-6 signaling and clinicopathological factors in patients with oral squamous cell carcinoma (OSCC). We retrospectively examined 116 patients who underwent radical surgery for OSCC. IL-6 and STAT3 expression were detected by immunohistochemistry. IL-6 and STAT3 positivity were detected by IHC, at 78.4 and 80.2 %, respectively. IL-6 expression was significantly associated with pattern of invasion (P = 0.004), vascular invasion (P = 0.003), and pathological nodal status (P = 0.019). Multivariate logistic regression analysis revealed that IL-6 expression was significantly associated with vascular invasion (P = 0.044). Meanwhile, there was no significant association between STAT3 expression and clinicopathological factors and no significant relationship between IL-6 and STAT3 expression. IL-6 expression was significantly associated with 5-year disease-free survival. These results suggest that IL-6 is involved in lymphangiogenesis and recurrence in OSCC.
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Acknowledgments
This study was supported in part by Grant 15 K11295 from the Ministry of Education, Culture, Sports, Science and Technology in Japan to S. Yanamoto. We would like to thank Editage (http://www.editage.jp/) for English-language editing.
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Shinagawa, K., Yanamoto, S., Naruse, T. et al. Clinical Roles of Interleukin-6 and STAT3 in Oral Squamous Cell Carcinoma. Pathol. Oncol. Res. 23, 425–431 (2017). https://doi.org/10.1007/s12253-016-0134-x
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DOI: https://doi.org/10.1007/s12253-016-0134-x